RT Journal Article SR Electronic T1 From the authors: Uneven use of noninvasive ventilation in acute respiratory failure in Europe JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 1537 OP 1537 DO 10.1183/09031936.00003211 VO 37 IS 6 A1 C. Crimi A1 A. Noto A1 P. Princi A1 A. Esquinas A1 S. Nava YR 2011 UL http://erj.ersjournals.com/content/37/6/1537.1.abstract AB